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[mirror_ubuntu-artful-kernel.git] / tools / perf / util / annotate.c
1 /*
2 * Copyright (C) 2011, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>
3 *
4 * Parts came from builtin-annotate.c, see those files for further
5 * copyright notes.
6 *
7 * Released under the GPL v2. (and only v2, not any later version)
8 */
9
10 #include "util.h"
11 #include "build-id.h"
12 #include "color.h"
13 #include "cache.h"
14 #include "symbol.h"
15 #include "debug.h"
16 #include "annotate.h"
17 #include "evsel.h"
18 #include <pthread.h>
19 #include <linux/bitops.h>
20
21 const char *disassembler_style;
22 const char *objdump_path;
23
24 static struct ins *ins__find(const char *name);
25 static int disasm_line__parse(char *line, char **namep, char **rawp);
26
27 static void ins__delete(struct ins_operands *ops)
28 {
29 zfree(&ops->source.raw);
30 zfree(&ops->source.name);
31 zfree(&ops->target.raw);
32 zfree(&ops->target.name);
33 }
34
35 static int ins__raw_scnprintf(struct ins *ins, char *bf, size_t size,
36 struct ins_operands *ops)
37 {
38 return scnprintf(bf, size, "%-6.6s %s", ins->name, ops->raw);
39 }
40
41 int ins__scnprintf(struct ins *ins, char *bf, size_t size,
42 struct ins_operands *ops)
43 {
44 if (ins->ops->scnprintf)
45 return ins->ops->scnprintf(ins, bf, size, ops);
46
47 return ins__raw_scnprintf(ins, bf, size, ops);
48 }
49
50 static int call__parse(struct ins_operands *ops)
51 {
52 char *endptr, *tok, *name;
53
54 ops->target.addr = strtoull(ops->raw, &endptr, 16);
55
56 name = strchr(endptr, '<');
57 if (name == NULL)
58 goto indirect_call;
59
60 name++;
61
62 tok = strchr(name, '>');
63 if (tok == NULL)
64 return -1;
65
66 *tok = '\0';
67 ops->target.name = strdup(name);
68 *tok = '>';
69
70 return ops->target.name == NULL ? -1 : 0;
71
72 indirect_call:
73 tok = strchr(endptr, '(');
74 if (tok != NULL) {
75 ops->target.addr = 0;
76 return 0;
77 }
78
79 tok = strchr(endptr, '*');
80 if (tok == NULL)
81 return -1;
82
83 ops->target.addr = strtoull(tok + 1, NULL, 16);
84 return 0;
85 }
86
87 static int call__scnprintf(struct ins *ins, char *bf, size_t size,
88 struct ins_operands *ops)
89 {
90 if (ops->target.name)
91 return scnprintf(bf, size, "%-6.6s %s", ins->name, ops->target.name);
92
93 if (ops->target.addr == 0)
94 return ins__raw_scnprintf(ins, bf, size, ops);
95
96 return scnprintf(bf, size, "%-6.6s *%" PRIx64, ins->name, ops->target.addr);
97 }
98
99 static struct ins_ops call_ops = {
100 .parse = call__parse,
101 .scnprintf = call__scnprintf,
102 };
103
104 bool ins__is_call(const struct ins *ins)
105 {
106 return ins->ops == &call_ops;
107 }
108
109 static int jump__parse(struct ins_operands *ops)
110 {
111 const char *s = strchr(ops->raw, '+');
112
113 ops->target.addr = strtoull(ops->raw, NULL, 16);
114
115 if (s++ != NULL)
116 ops->target.offset = strtoull(s, NULL, 16);
117 else
118 ops->target.offset = UINT64_MAX;
119
120 return 0;
121 }
122
123 static int jump__scnprintf(struct ins *ins, char *bf, size_t size,
124 struct ins_operands *ops)
125 {
126 return scnprintf(bf, size, "%-6.6s %" PRIx64, ins->name, ops->target.offset);
127 }
128
129 static struct ins_ops jump_ops = {
130 .parse = jump__parse,
131 .scnprintf = jump__scnprintf,
132 };
133
134 bool ins__is_jump(const struct ins *ins)
135 {
136 return ins->ops == &jump_ops;
137 }
138
139 static int comment__symbol(char *raw, char *comment, u64 *addrp, char **namep)
140 {
141 char *endptr, *name, *t;
142
143 if (strstr(raw, "(%rip)") == NULL)
144 return 0;
145
146 *addrp = strtoull(comment, &endptr, 16);
147 name = strchr(endptr, '<');
148 if (name == NULL)
149 return -1;
150
151 name++;
152
153 t = strchr(name, '>');
154 if (t == NULL)
155 return 0;
156
157 *t = '\0';
158 *namep = strdup(name);
159 *t = '>';
160
161 return 0;
162 }
163
164 static int lock__parse(struct ins_operands *ops)
165 {
166 char *name;
167
168 ops->locked.ops = zalloc(sizeof(*ops->locked.ops));
169 if (ops->locked.ops == NULL)
170 return 0;
171
172 if (disasm_line__parse(ops->raw, &name, &ops->locked.ops->raw) < 0)
173 goto out_free_ops;
174
175 ops->locked.ins = ins__find(name);
176 if (ops->locked.ins == NULL)
177 goto out_free_ops;
178
179 if (!ops->locked.ins->ops)
180 return 0;
181
182 if (ops->locked.ins->ops->parse)
183 ops->locked.ins->ops->parse(ops->locked.ops);
184
185 return 0;
186
187 out_free_ops:
188 zfree(&ops->locked.ops);
189 return 0;
190 }
191
192 static int lock__scnprintf(struct ins *ins, char *bf, size_t size,
193 struct ins_operands *ops)
194 {
195 int printed;
196
197 if (ops->locked.ins == NULL)
198 return ins__raw_scnprintf(ins, bf, size, ops);
199
200 printed = scnprintf(bf, size, "%-6.6s ", ins->name);
201 return printed + ins__scnprintf(ops->locked.ins, bf + printed,
202 size - printed, ops->locked.ops);
203 }
204
205 static void lock__delete(struct ins_operands *ops)
206 {
207 zfree(&ops->locked.ops);
208 zfree(&ops->target.raw);
209 zfree(&ops->target.name);
210 }
211
212 static struct ins_ops lock_ops = {
213 .free = lock__delete,
214 .parse = lock__parse,
215 .scnprintf = lock__scnprintf,
216 };
217
218 static int mov__parse(struct ins_operands *ops)
219 {
220 char *s = strchr(ops->raw, ','), *target, *comment, prev;
221
222 if (s == NULL)
223 return -1;
224
225 *s = '\0';
226 ops->source.raw = strdup(ops->raw);
227 *s = ',';
228
229 if (ops->source.raw == NULL)
230 return -1;
231
232 target = ++s;
233
234 while (s[0] != '\0' && !isspace(s[0]))
235 ++s;
236 prev = *s;
237 *s = '\0';
238
239 ops->target.raw = strdup(target);
240 *s = prev;
241
242 if (ops->target.raw == NULL)
243 goto out_free_source;
244
245 comment = strchr(s, '#');
246 if (comment == NULL)
247 return 0;
248
249 while (comment[0] != '\0' && isspace(comment[0]))
250 ++comment;
251
252 comment__symbol(ops->source.raw, comment, &ops->source.addr, &ops->source.name);
253 comment__symbol(ops->target.raw, comment, &ops->target.addr, &ops->target.name);
254
255 return 0;
256
257 out_free_source:
258 zfree(&ops->source.raw);
259 return -1;
260 }
261
262 static int mov__scnprintf(struct ins *ins, char *bf, size_t size,
263 struct ins_operands *ops)
264 {
265 return scnprintf(bf, size, "%-6.6s %s,%s", ins->name,
266 ops->source.name ?: ops->source.raw,
267 ops->target.name ?: ops->target.raw);
268 }
269
270 static struct ins_ops mov_ops = {
271 .parse = mov__parse,
272 .scnprintf = mov__scnprintf,
273 };
274
275 static int dec__parse(struct ins_operands *ops)
276 {
277 char *target, *comment, *s, prev;
278
279 target = s = ops->raw;
280
281 while (s[0] != '\0' && !isspace(s[0]))
282 ++s;
283 prev = *s;
284 *s = '\0';
285
286 ops->target.raw = strdup(target);
287 *s = prev;
288
289 if (ops->target.raw == NULL)
290 return -1;
291
292 comment = strchr(s, '#');
293 if (comment == NULL)
294 return 0;
295
296 while (comment[0] != '\0' && isspace(comment[0]))
297 ++comment;
298
299 comment__symbol(ops->target.raw, comment, &ops->target.addr, &ops->target.name);
300
301 return 0;
302 }
303
304 static int dec__scnprintf(struct ins *ins, char *bf, size_t size,
305 struct ins_operands *ops)
306 {
307 return scnprintf(bf, size, "%-6.6s %s", ins->name,
308 ops->target.name ?: ops->target.raw);
309 }
310
311 static struct ins_ops dec_ops = {
312 .parse = dec__parse,
313 .scnprintf = dec__scnprintf,
314 };
315
316 static int nop__scnprintf(struct ins *ins __maybe_unused, char *bf, size_t size,
317 struct ins_operands *ops __maybe_unused)
318 {
319 return scnprintf(bf, size, "%-6.6s", "nop");
320 }
321
322 static struct ins_ops nop_ops = {
323 .scnprintf = nop__scnprintf,
324 };
325
326 /*
327 * Must be sorted by name!
328 */
329 static struct ins instructions[] = {
330 { .name = "add", .ops = &mov_ops, },
331 { .name = "addl", .ops = &mov_ops, },
332 { .name = "addq", .ops = &mov_ops, },
333 { .name = "addw", .ops = &mov_ops, },
334 { .name = "and", .ops = &mov_ops, },
335 { .name = "bts", .ops = &mov_ops, },
336 { .name = "call", .ops = &call_ops, },
337 { .name = "callq", .ops = &call_ops, },
338 { .name = "cmp", .ops = &mov_ops, },
339 { .name = "cmpb", .ops = &mov_ops, },
340 { .name = "cmpl", .ops = &mov_ops, },
341 { .name = "cmpq", .ops = &mov_ops, },
342 { .name = "cmpw", .ops = &mov_ops, },
343 { .name = "cmpxch", .ops = &mov_ops, },
344 { .name = "dec", .ops = &dec_ops, },
345 { .name = "decl", .ops = &dec_ops, },
346 { .name = "imul", .ops = &mov_ops, },
347 { .name = "inc", .ops = &dec_ops, },
348 { .name = "incl", .ops = &dec_ops, },
349 { .name = "ja", .ops = &jump_ops, },
350 { .name = "jae", .ops = &jump_ops, },
351 { .name = "jb", .ops = &jump_ops, },
352 { .name = "jbe", .ops = &jump_ops, },
353 { .name = "jc", .ops = &jump_ops, },
354 { .name = "jcxz", .ops = &jump_ops, },
355 { .name = "je", .ops = &jump_ops, },
356 { .name = "jecxz", .ops = &jump_ops, },
357 { .name = "jg", .ops = &jump_ops, },
358 { .name = "jge", .ops = &jump_ops, },
359 { .name = "jl", .ops = &jump_ops, },
360 { .name = "jle", .ops = &jump_ops, },
361 { .name = "jmp", .ops = &jump_ops, },
362 { .name = "jmpq", .ops = &jump_ops, },
363 { .name = "jna", .ops = &jump_ops, },
364 { .name = "jnae", .ops = &jump_ops, },
365 { .name = "jnb", .ops = &jump_ops, },
366 { .name = "jnbe", .ops = &jump_ops, },
367 { .name = "jnc", .ops = &jump_ops, },
368 { .name = "jne", .ops = &jump_ops, },
369 { .name = "jng", .ops = &jump_ops, },
370 { .name = "jnge", .ops = &jump_ops, },
371 { .name = "jnl", .ops = &jump_ops, },
372 { .name = "jnle", .ops = &jump_ops, },
373 { .name = "jno", .ops = &jump_ops, },
374 { .name = "jnp", .ops = &jump_ops, },
375 { .name = "jns", .ops = &jump_ops, },
376 { .name = "jnz", .ops = &jump_ops, },
377 { .name = "jo", .ops = &jump_ops, },
378 { .name = "jp", .ops = &jump_ops, },
379 { .name = "jpe", .ops = &jump_ops, },
380 { .name = "jpo", .ops = &jump_ops, },
381 { .name = "jrcxz", .ops = &jump_ops, },
382 { .name = "js", .ops = &jump_ops, },
383 { .name = "jz", .ops = &jump_ops, },
384 { .name = "lea", .ops = &mov_ops, },
385 { .name = "lock", .ops = &lock_ops, },
386 { .name = "mov", .ops = &mov_ops, },
387 { .name = "movb", .ops = &mov_ops, },
388 { .name = "movdqa",.ops = &mov_ops, },
389 { .name = "movl", .ops = &mov_ops, },
390 { .name = "movq", .ops = &mov_ops, },
391 { .name = "movslq", .ops = &mov_ops, },
392 { .name = "movzbl", .ops = &mov_ops, },
393 { .name = "movzwl", .ops = &mov_ops, },
394 { .name = "nop", .ops = &nop_ops, },
395 { .name = "nopl", .ops = &nop_ops, },
396 { .name = "nopw", .ops = &nop_ops, },
397 { .name = "or", .ops = &mov_ops, },
398 { .name = "orl", .ops = &mov_ops, },
399 { .name = "test", .ops = &mov_ops, },
400 { .name = "testb", .ops = &mov_ops, },
401 { .name = "testl", .ops = &mov_ops, },
402 { .name = "xadd", .ops = &mov_ops, },
403 { .name = "xbeginl", .ops = &jump_ops, },
404 { .name = "xbeginq", .ops = &jump_ops, },
405 };
406
407 static int ins__cmp(const void *name, const void *insp)
408 {
409 const struct ins *ins = insp;
410
411 return strcmp(name, ins->name);
412 }
413
414 static struct ins *ins__find(const char *name)
415 {
416 const int nmemb = ARRAY_SIZE(instructions);
417
418 return bsearch(name, instructions, nmemb, sizeof(struct ins), ins__cmp);
419 }
420
421 int symbol__annotate_init(struct map *map __maybe_unused, struct symbol *sym)
422 {
423 struct annotation *notes = symbol__annotation(sym);
424 pthread_mutex_init(&notes->lock, NULL);
425 return 0;
426 }
427
428 int symbol__alloc_hist(struct symbol *sym)
429 {
430 struct annotation *notes = symbol__annotation(sym);
431 const size_t size = symbol__size(sym);
432 size_t sizeof_sym_hist;
433
434 /* Check for overflow when calculating sizeof_sym_hist */
435 if (size > (SIZE_MAX - sizeof(struct sym_hist)) / sizeof(u64))
436 return -1;
437
438 sizeof_sym_hist = (sizeof(struct sym_hist) + size * sizeof(u64));
439
440 /* Check for overflow in zalloc argument */
441 if (sizeof_sym_hist > (SIZE_MAX - sizeof(*notes->src))
442 / symbol_conf.nr_events)
443 return -1;
444
445 notes->src = zalloc(sizeof(*notes->src) + symbol_conf.nr_events * sizeof_sym_hist);
446 if (notes->src == NULL)
447 return -1;
448 notes->src->sizeof_sym_hist = sizeof_sym_hist;
449 notes->src->nr_histograms = symbol_conf.nr_events;
450 INIT_LIST_HEAD(&notes->src->source);
451 return 0;
452 }
453
454 void symbol__annotate_zero_histograms(struct symbol *sym)
455 {
456 struct annotation *notes = symbol__annotation(sym);
457
458 pthread_mutex_lock(&notes->lock);
459 if (notes->src != NULL)
460 memset(notes->src->histograms, 0,
461 notes->src->nr_histograms * notes->src->sizeof_sym_hist);
462 pthread_mutex_unlock(&notes->lock);
463 }
464
465 static int __symbol__inc_addr_samples(struct symbol *sym, struct map *map,
466 struct annotation *notes, int evidx, u64 addr)
467 {
468 unsigned offset;
469 struct sym_hist *h;
470
471 pr_debug3("%s: addr=%#" PRIx64 "\n", __func__, map->unmap_ip(map, addr));
472
473 if (addr < sym->start || addr > sym->end)
474 return -ERANGE;
475
476 offset = addr - sym->start;
477 h = annotation__histogram(notes, evidx);
478 h->sum++;
479 h->addr[offset]++;
480
481 pr_debug3("%#" PRIx64 " %s: period++ [addr: %#" PRIx64 ", %#" PRIx64
482 ", evidx=%d] => %" PRIu64 "\n", sym->start, sym->name,
483 addr, addr - sym->start, evidx, h->addr[offset]);
484 return 0;
485 }
486
487 static int symbol__inc_addr_samples(struct symbol *sym, struct map *map,
488 int evidx, u64 addr)
489 {
490 struct annotation *notes;
491
492 if (sym == NULL || use_browser != 1 || !sort__has_sym)
493 return 0;
494
495 notes = symbol__annotation(sym);
496 if (notes->src == NULL) {
497 if (symbol__alloc_hist(sym) < 0)
498 return -ENOMEM;
499 }
500
501 return __symbol__inc_addr_samples(sym, map, notes, evidx, addr);
502 }
503
504 int addr_map_symbol__inc_samples(struct addr_map_symbol *ams, int evidx)
505 {
506 return symbol__inc_addr_samples(ams->sym, ams->map, evidx, ams->al_addr);
507 }
508
509 int hist_entry__inc_addr_samples(struct hist_entry *he, int evidx, u64 ip)
510 {
511 return symbol__inc_addr_samples(he->ms.sym, he->ms.map, evidx, ip);
512 }
513
514 static void disasm_line__init_ins(struct disasm_line *dl)
515 {
516 dl->ins = ins__find(dl->name);
517
518 if (dl->ins == NULL)
519 return;
520
521 if (!dl->ins->ops)
522 return;
523
524 if (dl->ins->ops->parse)
525 dl->ins->ops->parse(&dl->ops);
526 }
527
528 static int disasm_line__parse(char *line, char **namep, char **rawp)
529 {
530 char *name = line, tmp;
531
532 while (isspace(name[0]))
533 ++name;
534
535 if (name[0] == '\0')
536 return -1;
537
538 *rawp = name + 1;
539
540 while ((*rawp)[0] != '\0' && !isspace((*rawp)[0]))
541 ++*rawp;
542
543 tmp = (*rawp)[0];
544 (*rawp)[0] = '\0';
545 *namep = strdup(name);
546
547 if (*namep == NULL)
548 goto out_free_name;
549
550 (*rawp)[0] = tmp;
551
552 if ((*rawp)[0] != '\0') {
553 (*rawp)++;
554 while (isspace((*rawp)[0]))
555 ++(*rawp);
556 }
557
558 return 0;
559
560 out_free_name:
561 zfree(namep);
562 return -1;
563 }
564
565 static struct disasm_line *disasm_line__new(s64 offset, char *line, size_t privsize)
566 {
567 struct disasm_line *dl = zalloc(sizeof(*dl) + privsize);
568
569 if (dl != NULL) {
570 dl->offset = offset;
571 dl->line = strdup(line);
572 if (dl->line == NULL)
573 goto out_delete;
574
575 if (offset != -1) {
576 if (disasm_line__parse(dl->line, &dl->name, &dl->ops.raw) < 0)
577 goto out_free_line;
578
579 disasm_line__init_ins(dl);
580 }
581 }
582
583 return dl;
584
585 out_free_line:
586 zfree(&dl->line);
587 out_delete:
588 free(dl);
589 return NULL;
590 }
591
592 void disasm_line__free(struct disasm_line *dl)
593 {
594 zfree(&dl->line);
595 zfree(&dl->name);
596 if (dl->ins && dl->ins->ops->free)
597 dl->ins->ops->free(&dl->ops);
598 else
599 ins__delete(&dl->ops);
600 free(dl);
601 }
602
603 int disasm_line__scnprintf(struct disasm_line *dl, char *bf, size_t size, bool raw)
604 {
605 if (raw || !dl->ins)
606 return scnprintf(bf, size, "%-6.6s %s", dl->name, dl->ops.raw);
607
608 return ins__scnprintf(dl->ins, bf, size, &dl->ops);
609 }
610
611 static void disasm__add(struct list_head *head, struct disasm_line *line)
612 {
613 list_add_tail(&line->node, head);
614 }
615
616 struct disasm_line *disasm__get_next_ip_line(struct list_head *head, struct disasm_line *pos)
617 {
618 list_for_each_entry_continue(pos, head, node)
619 if (pos->offset >= 0)
620 return pos;
621
622 return NULL;
623 }
624
625 double disasm__calc_percent(struct annotation *notes, int evidx, s64 offset,
626 s64 end, const char **path)
627 {
628 struct source_line *src_line = notes->src->lines;
629 double percent = 0.0;
630
631 if (src_line) {
632 size_t sizeof_src_line = sizeof(*src_line) +
633 sizeof(src_line->p) * (src_line->nr_pcnt - 1);
634
635 while (offset < end) {
636 src_line = (void *)notes->src->lines +
637 (sizeof_src_line * offset);
638
639 if (*path == NULL)
640 *path = src_line->path;
641
642 percent += src_line->p[evidx].percent;
643 offset++;
644 }
645 } else {
646 struct sym_hist *h = annotation__histogram(notes, evidx);
647 unsigned int hits = 0;
648
649 while (offset < end)
650 hits += h->addr[offset++];
651
652 if (h->sum)
653 percent = 100.0 * hits / h->sum;
654 }
655
656 return percent;
657 }
658
659 static int disasm_line__print(struct disasm_line *dl, struct symbol *sym, u64 start,
660 struct perf_evsel *evsel, u64 len, int min_pcnt, int printed,
661 int max_lines, struct disasm_line *queue)
662 {
663 static const char *prev_line;
664 static const char *prev_color;
665
666 if (dl->offset != -1) {
667 const char *path = NULL;
668 double percent, max_percent = 0.0;
669 double *ppercents = &percent;
670 int i, nr_percent = 1;
671 const char *color;
672 struct annotation *notes = symbol__annotation(sym);
673 s64 offset = dl->offset;
674 const u64 addr = start + offset;
675 struct disasm_line *next;
676
677 next = disasm__get_next_ip_line(&notes->src->source, dl);
678
679 if (perf_evsel__is_group_event(evsel)) {
680 nr_percent = evsel->nr_members;
681 ppercents = calloc(nr_percent, sizeof(double));
682 if (ppercents == NULL)
683 return -1;
684 }
685
686 for (i = 0; i < nr_percent; i++) {
687 percent = disasm__calc_percent(notes,
688 notes->src->lines ? i : evsel->idx + i,
689 offset,
690 next ? next->offset : (s64) len,
691 &path);
692
693 ppercents[i] = percent;
694 if (percent > max_percent)
695 max_percent = percent;
696 }
697
698 if (max_percent < min_pcnt)
699 return -1;
700
701 if (max_lines && printed >= max_lines)
702 return 1;
703
704 if (queue != NULL) {
705 list_for_each_entry_from(queue, &notes->src->source, node) {
706 if (queue == dl)
707 break;
708 disasm_line__print(queue, sym, start, evsel, len,
709 0, 0, 1, NULL);
710 }
711 }
712
713 color = get_percent_color(max_percent);
714
715 /*
716 * Also color the filename and line if needed, with
717 * the same color than the percentage. Don't print it
718 * twice for close colored addr with the same filename:line
719 */
720 if (path) {
721 if (!prev_line || strcmp(prev_line, path)
722 || color != prev_color) {
723 color_fprintf(stdout, color, " %s", path);
724 prev_line = path;
725 prev_color = color;
726 }
727 }
728
729 for (i = 0; i < nr_percent; i++) {
730 percent = ppercents[i];
731 color = get_percent_color(percent);
732 color_fprintf(stdout, color, " %7.2f", percent);
733 }
734
735 printf(" : ");
736 color_fprintf(stdout, PERF_COLOR_MAGENTA, " %" PRIx64 ":", addr);
737 color_fprintf(stdout, PERF_COLOR_BLUE, "%s\n", dl->line);
738
739 if (ppercents != &percent)
740 free(ppercents);
741
742 } else if (max_lines && printed >= max_lines)
743 return 1;
744 else {
745 int width = 8;
746
747 if (queue)
748 return -1;
749
750 if (perf_evsel__is_group_event(evsel))
751 width *= evsel->nr_members;
752
753 if (!*dl->line)
754 printf(" %*s:\n", width, " ");
755 else
756 printf(" %*s: %s\n", width, " ", dl->line);
757 }
758
759 return 0;
760 }
761
762 /*
763 * symbol__parse_objdump_line() parses objdump output (with -d --no-show-raw)
764 * which looks like following
765 *
766 * 0000000000415500 <_init>:
767 * 415500: sub $0x8,%rsp
768 * 415504: mov 0x2f5ad5(%rip),%rax # 70afe0 <_DYNAMIC+0x2f8>
769 * 41550b: test %rax,%rax
770 * 41550e: je 415515 <_init+0x15>
771 * 415510: callq 416e70 <__gmon_start__@plt>
772 * 415515: add $0x8,%rsp
773 * 415519: retq
774 *
775 * it will be parsed and saved into struct disasm_line as
776 * <offset> <name> <ops.raw>
777 *
778 * The offset will be a relative offset from the start of the symbol and -1
779 * means that it's not a disassembly line so should be treated differently.
780 * The ops.raw part will be parsed further according to type of the instruction.
781 */
782 static int symbol__parse_objdump_line(struct symbol *sym, struct map *map,
783 FILE *file, size_t privsize)
784 {
785 struct annotation *notes = symbol__annotation(sym);
786 struct disasm_line *dl;
787 char *line = NULL, *parsed_line, *tmp, *tmp2, *c;
788 size_t line_len;
789 s64 line_ip, offset = -1;
790
791 if (getline(&line, &line_len, file) < 0)
792 return -1;
793
794 if (!line)
795 return -1;
796
797 while (line_len != 0 && isspace(line[line_len - 1]))
798 line[--line_len] = '\0';
799
800 c = strchr(line, '\n');
801 if (c)
802 *c = 0;
803
804 line_ip = -1;
805 parsed_line = line;
806
807 /*
808 * Strip leading spaces:
809 */
810 tmp = line;
811 while (*tmp) {
812 if (*tmp != ' ')
813 break;
814 tmp++;
815 }
816
817 if (*tmp) {
818 /*
819 * Parse hexa addresses followed by ':'
820 */
821 line_ip = strtoull(tmp, &tmp2, 16);
822 if (*tmp2 != ':' || tmp == tmp2 || tmp2[1] == '\0')
823 line_ip = -1;
824 }
825
826 if (line_ip != -1) {
827 u64 start = map__rip_2objdump(map, sym->start),
828 end = map__rip_2objdump(map, sym->end);
829
830 offset = line_ip - start;
831 if ((u64)line_ip < start || (u64)line_ip > end)
832 offset = -1;
833 else
834 parsed_line = tmp2 + 1;
835 }
836
837 dl = disasm_line__new(offset, parsed_line, privsize);
838 free(line);
839
840 if (dl == NULL)
841 return -1;
842
843 if (dl->ops.target.offset == UINT64_MAX)
844 dl->ops.target.offset = dl->ops.target.addr -
845 map__rip_2objdump(map, sym->start);
846
847 /* kcore has no symbols, so add the call target name */
848 if (dl->ins && ins__is_call(dl->ins) && !dl->ops.target.name) {
849 struct addr_map_symbol target = {
850 .map = map,
851 .addr = dl->ops.target.addr,
852 };
853
854 if (!map_groups__find_ams(&target, NULL) &&
855 target.sym->start == target.al_addr)
856 dl->ops.target.name = strdup(target.sym->name);
857 }
858
859 disasm__add(&notes->src->source, dl);
860
861 return 0;
862 }
863
864 static void delete_last_nop(struct symbol *sym)
865 {
866 struct annotation *notes = symbol__annotation(sym);
867 struct list_head *list = &notes->src->source;
868 struct disasm_line *dl;
869
870 while (!list_empty(list)) {
871 dl = list_entry(list->prev, struct disasm_line, node);
872
873 if (dl->ins && dl->ins->ops) {
874 if (dl->ins->ops != &nop_ops)
875 return;
876 } else {
877 if (!strstr(dl->line, " nop ") &&
878 !strstr(dl->line, " nopl ") &&
879 !strstr(dl->line, " nopw "))
880 return;
881 }
882
883 list_del(&dl->node);
884 disasm_line__free(dl);
885 }
886 }
887
888 int symbol__annotate(struct symbol *sym, struct map *map, size_t privsize)
889 {
890 struct dso *dso = map->dso;
891 char *filename = dso__build_id_filename(dso, NULL, 0);
892 bool free_filename = true;
893 char command[PATH_MAX * 2];
894 FILE *file;
895 int err = 0;
896 char symfs_filename[PATH_MAX];
897 struct kcore_extract kce;
898 bool delete_extract = false;
899
900 if (filename) {
901 snprintf(symfs_filename, sizeof(symfs_filename), "%s%s",
902 symbol_conf.symfs, filename);
903 }
904
905 if (filename == NULL) {
906 if (dso->has_build_id) {
907 pr_err("Can't annotate %s: not enough memory\n",
908 sym->name);
909 return -ENOMEM;
910 }
911 goto fallback;
912 } else if (readlink(symfs_filename, command, sizeof(command)) < 0 ||
913 strstr(command, "[kernel.kallsyms]") ||
914 access(symfs_filename, R_OK)) {
915 free(filename);
916 fallback:
917 /*
918 * If we don't have build-ids or the build-id file isn't in the
919 * cache, or is just a kallsyms file, well, lets hope that this
920 * DSO is the same as when 'perf record' ran.
921 */
922 filename = (char *)dso->long_name;
923 snprintf(symfs_filename, sizeof(symfs_filename), "%s%s",
924 symbol_conf.symfs, filename);
925 free_filename = false;
926 }
927
928 if (dso->symtab_type == DSO_BINARY_TYPE__KALLSYMS &&
929 !dso__is_kcore(dso)) {
930 char bf[BUILD_ID_SIZE * 2 + 16] = " with build id ";
931 char *build_id_msg = NULL;
932
933 if (dso->annotate_warned)
934 goto out_free_filename;
935
936 if (dso->has_build_id) {
937 build_id__sprintf(dso->build_id,
938 sizeof(dso->build_id), bf + 15);
939 build_id_msg = bf;
940 }
941 err = -ENOENT;
942 dso->annotate_warned = 1;
943 pr_err("Can't annotate %s:\n\n"
944 "No vmlinux file%s\nwas found in the path.\n\n"
945 "Please use:\n\n"
946 " perf buildid-cache -vu vmlinux\n\n"
947 "or:\n\n"
948 " --vmlinux vmlinux\n",
949 sym->name, build_id_msg ?: "");
950 goto out_free_filename;
951 }
952
953 pr_debug("%s: filename=%s, sym=%s, start=%#" PRIx64 ", end=%#" PRIx64 "\n", __func__,
954 filename, sym->name, map->unmap_ip(map, sym->start),
955 map->unmap_ip(map, sym->end));
956
957 pr_debug("annotating [%p] %30s : [%p] %30s\n",
958 dso, dso->long_name, sym, sym->name);
959
960 if (dso__is_kcore(dso)) {
961 kce.kcore_filename = symfs_filename;
962 kce.addr = map__rip_2objdump(map, sym->start);
963 kce.offs = sym->start;
964 kce.len = sym->end + 1 - sym->start;
965 if (!kcore_extract__create(&kce)) {
966 delete_extract = true;
967 strlcpy(symfs_filename, kce.extract_filename,
968 sizeof(symfs_filename));
969 if (free_filename) {
970 free(filename);
971 free_filename = false;
972 }
973 filename = symfs_filename;
974 }
975 }
976
977 snprintf(command, sizeof(command),
978 "%s %s%s --start-address=0x%016" PRIx64
979 " --stop-address=0x%016" PRIx64
980 " -d %s %s -C %s 2>/dev/null|grep -v %s|expand",
981 objdump_path ? objdump_path : "objdump",
982 disassembler_style ? "-M " : "",
983 disassembler_style ? disassembler_style : "",
984 map__rip_2objdump(map, sym->start),
985 map__rip_2objdump(map, sym->end+1),
986 symbol_conf.annotate_asm_raw ? "" : "--no-show-raw",
987 symbol_conf.annotate_src ? "-S" : "",
988 symfs_filename, filename);
989
990 pr_debug("Executing: %s\n", command);
991
992 file = popen(command, "r");
993 if (!file)
994 goto out_free_filename;
995
996 while (!feof(file))
997 if (symbol__parse_objdump_line(sym, map, file, privsize) < 0)
998 break;
999
1000 /*
1001 * kallsyms does not have symbol sizes so there may a nop at the end.
1002 * Remove it.
1003 */
1004 if (dso__is_kcore(dso))
1005 delete_last_nop(sym);
1006
1007 pclose(file);
1008 out_free_filename:
1009 if (delete_extract)
1010 kcore_extract__delete(&kce);
1011 if (free_filename)
1012 free(filename);
1013 return err;
1014 }
1015
1016 static void insert_source_line(struct rb_root *root, struct source_line *src_line)
1017 {
1018 struct source_line *iter;
1019 struct rb_node **p = &root->rb_node;
1020 struct rb_node *parent = NULL;
1021 int i, ret;
1022
1023 while (*p != NULL) {
1024 parent = *p;
1025 iter = rb_entry(parent, struct source_line, node);
1026
1027 ret = strcmp(iter->path, src_line->path);
1028 if (ret == 0) {
1029 for (i = 0; i < src_line->nr_pcnt; i++)
1030 iter->p[i].percent_sum += src_line->p[i].percent;
1031 return;
1032 }
1033
1034 if (ret < 0)
1035 p = &(*p)->rb_left;
1036 else
1037 p = &(*p)->rb_right;
1038 }
1039
1040 for (i = 0; i < src_line->nr_pcnt; i++)
1041 src_line->p[i].percent_sum = src_line->p[i].percent;
1042
1043 rb_link_node(&src_line->node, parent, p);
1044 rb_insert_color(&src_line->node, root);
1045 }
1046
1047 static int cmp_source_line(struct source_line *a, struct source_line *b)
1048 {
1049 int i;
1050
1051 for (i = 0; i < a->nr_pcnt; i++) {
1052 if (a->p[i].percent_sum == b->p[i].percent_sum)
1053 continue;
1054 return a->p[i].percent_sum > b->p[i].percent_sum;
1055 }
1056
1057 return 0;
1058 }
1059
1060 static void __resort_source_line(struct rb_root *root, struct source_line *src_line)
1061 {
1062 struct source_line *iter;
1063 struct rb_node **p = &root->rb_node;
1064 struct rb_node *parent = NULL;
1065
1066 while (*p != NULL) {
1067 parent = *p;
1068 iter = rb_entry(parent, struct source_line, node);
1069
1070 if (cmp_source_line(src_line, iter))
1071 p = &(*p)->rb_left;
1072 else
1073 p = &(*p)->rb_right;
1074 }
1075
1076 rb_link_node(&src_line->node, parent, p);
1077 rb_insert_color(&src_line->node, root);
1078 }
1079
1080 static void resort_source_line(struct rb_root *dest_root, struct rb_root *src_root)
1081 {
1082 struct source_line *src_line;
1083 struct rb_node *node;
1084
1085 node = rb_first(src_root);
1086 while (node) {
1087 struct rb_node *next;
1088
1089 src_line = rb_entry(node, struct source_line, node);
1090 next = rb_next(node);
1091 rb_erase(node, src_root);
1092
1093 __resort_source_line(dest_root, src_line);
1094 node = next;
1095 }
1096 }
1097
1098 static void symbol__free_source_line(struct symbol *sym, int len)
1099 {
1100 struct annotation *notes = symbol__annotation(sym);
1101 struct source_line *src_line = notes->src->lines;
1102 size_t sizeof_src_line;
1103 int i;
1104
1105 sizeof_src_line = sizeof(*src_line) +
1106 (sizeof(src_line->p) * (src_line->nr_pcnt - 1));
1107
1108 for (i = 0; i < len; i++) {
1109 free_srcline(src_line->path);
1110 src_line = (void *)src_line + sizeof_src_line;
1111 }
1112
1113 zfree(&notes->src->lines);
1114 }
1115
1116 /* Get the filename:line for the colored entries */
1117 static int symbol__get_source_line(struct symbol *sym, struct map *map,
1118 struct perf_evsel *evsel,
1119 struct rb_root *root, int len)
1120 {
1121 u64 start;
1122 int i, k;
1123 int evidx = evsel->idx;
1124 struct source_line *src_line;
1125 struct annotation *notes = symbol__annotation(sym);
1126 struct sym_hist *h = annotation__histogram(notes, evidx);
1127 struct rb_root tmp_root = RB_ROOT;
1128 int nr_pcnt = 1;
1129 u64 h_sum = h->sum;
1130 size_t sizeof_src_line = sizeof(struct source_line);
1131
1132 if (perf_evsel__is_group_event(evsel)) {
1133 for (i = 1; i < evsel->nr_members; i++) {
1134 h = annotation__histogram(notes, evidx + i);
1135 h_sum += h->sum;
1136 }
1137 nr_pcnt = evsel->nr_members;
1138 sizeof_src_line += (nr_pcnt - 1) * sizeof(src_line->p);
1139 }
1140
1141 if (!h_sum)
1142 return 0;
1143
1144 src_line = notes->src->lines = calloc(len, sizeof_src_line);
1145 if (!notes->src->lines)
1146 return -1;
1147
1148 start = map__rip_2objdump(map, sym->start);
1149
1150 for (i = 0; i < len; i++) {
1151 u64 offset;
1152 double percent_max = 0.0;
1153
1154 src_line->nr_pcnt = nr_pcnt;
1155
1156 for (k = 0; k < nr_pcnt; k++) {
1157 h = annotation__histogram(notes, evidx + k);
1158 src_line->p[k].percent = 100.0 * h->addr[i] / h->sum;
1159
1160 if (src_line->p[k].percent > percent_max)
1161 percent_max = src_line->p[k].percent;
1162 }
1163
1164 if (percent_max <= 0.5)
1165 goto next;
1166
1167 offset = start + i;
1168 src_line->path = get_srcline(map->dso, offset);
1169 insert_source_line(&tmp_root, src_line);
1170
1171 next:
1172 src_line = (void *)src_line + sizeof_src_line;
1173 }
1174
1175 resort_source_line(root, &tmp_root);
1176 return 0;
1177 }
1178
1179 static void print_summary(struct rb_root *root, const char *filename)
1180 {
1181 struct source_line *src_line;
1182 struct rb_node *node;
1183
1184 printf("\nSorted summary for file %s\n", filename);
1185 printf("----------------------------------------------\n\n");
1186
1187 if (RB_EMPTY_ROOT(root)) {
1188 printf(" Nothing higher than %1.1f%%\n", MIN_GREEN);
1189 return;
1190 }
1191
1192 node = rb_first(root);
1193 while (node) {
1194 double percent, percent_max = 0.0;
1195 const char *color;
1196 char *path;
1197 int i;
1198
1199 src_line = rb_entry(node, struct source_line, node);
1200 for (i = 0; i < src_line->nr_pcnt; i++) {
1201 percent = src_line->p[i].percent_sum;
1202 color = get_percent_color(percent);
1203 color_fprintf(stdout, color, " %7.2f", percent);
1204
1205 if (percent > percent_max)
1206 percent_max = percent;
1207 }
1208
1209 path = src_line->path;
1210 color = get_percent_color(percent_max);
1211 color_fprintf(stdout, color, " %s\n", path);
1212
1213 node = rb_next(node);
1214 }
1215 }
1216
1217 static void symbol__annotate_hits(struct symbol *sym, struct perf_evsel *evsel)
1218 {
1219 struct annotation *notes = symbol__annotation(sym);
1220 struct sym_hist *h = annotation__histogram(notes, evsel->idx);
1221 u64 len = symbol__size(sym), offset;
1222
1223 for (offset = 0; offset < len; ++offset)
1224 if (h->addr[offset] != 0)
1225 printf("%*" PRIx64 ": %" PRIu64 "\n", BITS_PER_LONG / 2,
1226 sym->start + offset, h->addr[offset]);
1227 printf("%*s: %" PRIu64 "\n", BITS_PER_LONG / 2, "h->sum", h->sum);
1228 }
1229
1230 int symbol__annotate_printf(struct symbol *sym, struct map *map,
1231 struct perf_evsel *evsel, bool full_paths,
1232 int min_pcnt, int max_lines, int context)
1233 {
1234 struct dso *dso = map->dso;
1235 char *filename;
1236 const char *d_filename;
1237 struct annotation *notes = symbol__annotation(sym);
1238 struct disasm_line *pos, *queue = NULL;
1239 u64 start = map__rip_2objdump(map, sym->start);
1240 int printed = 2, queue_len = 0;
1241 int more = 0;
1242 u64 len;
1243 int width = 8;
1244 int namelen;
1245
1246 filename = strdup(dso->long_name);
1247 if (!filename)
1248 return -ENOMEM;
1249
1250 if (full_paths)
1251 d_filename = filename;
1252 else
1253 d_filename = basename(filename);
1254
1255 len = symbol__size(sym);
1256 namelen = strlen(d_filename);
1257
1258 if (perf_evsel__is_group_event(evsel))
1259 width *= evsel->nr_members;
1260
1261 printf(" %-*.*s| Source code & Disassembly of %s\n",
1262 width, width, "Percent", d_filename);
1263 printf("-%-*.*s-------------------------------------\n",
1264 width+namelen, width+namelen, graph_dotted_line);
1265
1266 if (verbose)
1267 symbol__annotate_hits(sym, evsel);
1268
1269 list_for_each_entry(pos, &notes->src->source, node) {
1270 if (context && queue == NULL) {
1271 queue = pos;
1272 queue_len = 0;
1273 }
1274
1275 switch (disasm_line__print(pos, sym, start, evsel, len,
1276 min_pcnt, printed, max_lines,
1277 queue)) {
1278 case 0:
1279 ++printed;
1280 if (context) {
1281 printed += queue_len;
1282 queue = NULL;
1283 queue_len = 0;
1284 }
1285 break;
1286 case 1:
1287 /* filtered by max_lines */
1288 ++more;
1289 break;
1290 case -1:
1291 default:
1292 /*
1293 * Filtered by min_pcnt or non IP lines when
1294 * context != 0
1295 */
1296 if (!context)
1297 break;
1298 if (queue_len == context)
1299 queue = list_entry(queue->node.next, typeof(*queue), node);
1300 else
1301 ++queue_len;
1302 break;
1303 }
1304 }
1305
1306 free(filename);
1307
1308 return more;
1309 }
1310
1311 void symbol__annotate_zero_histogram(struct symbol *sym, int evidx)
1312 {
1313 struct annotation *notes = symbol__annotation(sym);
1314 struct sym_hist *h = annotation__histogram(notes, evidx);
1315
1316 memset(h, 0, notes->src->sizeof_sym_hist);
1317 }
1318
1319 void symbol__annotate_decay_histogram(struct symbol *sym, int evidx)
1320 {
1321 struct annotation *notes = symbol__annotation(sym);
1322 struct sym_hist *h = annotation__histogram(notes, evidx);
1323 int len = symbol__size(sym), offset;
1324
1325 h->sum = 0;
1326 for (offset = 0; offset < len; ++offset) {
1327 h->addr[offset] = h->addr[offset] * 7 / 8;
1328 h->sum += h->addr[offset];
1329 }
1330 }
1331
1332 void disasm__purge(struct list_head *head)
1333 {
1334 struct disasm_line *pos, *n;
1335
1336 list_for_each_entry_safe(pos, n, head, node) {
1337 list_del(&pos->node);
1338 disasm_line__free(pos);
1339 }
1340 }
1341
1342 static size_t disasm_line__fprintf(struct disasm_line *dl, FILE *fp)
1343 {
1344 size_t printed;
1345
1346 if (dl->offset == -1)
1347 return fprintf(fp, "%s\n", dl->line);
1348
1349 printed = fprintf(fp, "%#" PRIx64 " %s", dl->offset, dl->name);
1350
1351 if (dl->ops.raw[0] != '\0') {
1352 printed += fprintf(fp, "%.*s %s\n", 6 - (int)printed, " ",
1353 dl->ops.raw);
1354 }
1355
1356 return printed + fprintf(fp, "\n");
1357 }
1358
1359 size_t disasm__fprintf(struct list_head *head, FILE *fp)
1360 {
1361 struct disasm_line *pos;
1362 size_t printed = 0;
1363
1364 list_for_each_entry(pos, head, node)
1365 printed += disasm_line__fprintf(pos, fp);
1366
1367 return printed;
1368 }
1369
1370 int symbol__tty_annotate(struct symbol *sym, struct map *map,
1371 struct perf_evsel *evsel, bool print_lines,
1372 bool full_paths, int min_pcnt, int max_lines)
1373 {
1374 struct dso *dso = map->dso;
1375 struct rb_root source_line = RB_ROOT;
1376 u64 len;
1377
1378 if (symbol__annotate(sym, map, 0) < 0)
1379 return -1;
1380
1381 len = symbol__size(sym);
1382
1383 if (print_lines) {
1384 symbol__get_source_line(sym, map, evsel, &source_line, len);
1385 print_summary(&source_line, dso->long_name);
1386 }
1387
1388 symbol__annotate_printf(sym, map, evsel, full_paths,
1389 min_pcnt, max_lines, 0);
1390 if (print_lines)
1391 symbol__free_source_line(sym, len);
1392
1393 disasm__purge(&symbol__annotation(sym)->src->source);
1394
1395 return 0;
1396 }
1397
1398 int hist_entry__annotate(struct hist_entry *he, size_t privsize)
1399 {
1400 return symbol__annotate(he->ms.sym, he->ms.map, privsize);
1401 }
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